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- Title
The Triassic eucynodont Candelariodon barberenai revisited and the early diversity of stem prozostrodontians.
- Authors
MARTINELLI, AGUSTÍN G.; SOARES, MARINA BENTO; DE OLIVEIRA, TÉO VEIGA; RODRIGUES, PABLO G.; SCHULTZ, CESAR L.
- Abstract
The dental anatomy of Candelariodon barberenai from the Dino donto saurus Assemblage Zone (Pinheiros-Chiniquá Sequence, Santa Maria Supersequence, late Ladinian-early Carnian) of south Brazil, is redescribed. Candelariodon was originally classified as Eucynodontia incertae sedis and our analysis recovered this taxon deeply nested within Probainognathia, as the sister taxon of Potheriodon plus Prozostrodontia. The lower postcanine dentition of Candelariodon has several apomorphies shared with Prozostrodon, Santacruzgnathus, Brasilodon/Brasilitherium, and some basal mammaliaforms (Morganucodon, Megazostrodon), such as a lingual cingulum with discrete cusps e and g and two distinct morphologies in the tooth row. The reinterpretation of Candelariodon as a probainognatian cynodont more derived than Probainognathus and the rich Brazilian fossil record document an important adaptive radiation of non-mammaliaform prozostrodontians and closely related forms prior to the origin of the mammaliaform clade.
- Subjects
CYNODONTIA; REPTILE diversity; MAMMAL morphology; REPTILE classification; FOSSIL teeth
- Publication
Acta Palaeontologica Polonica, 2017, Vol 62, Issue 3, p527
- ISSN
0567-7920
- Publication type
Article
- DOI
10.4202/app.00344.2017